This image shows a portion of the Networking Advanced variables on the Create Stack, Configure Variables page.
This is four of five.

On the left there are steps indicating the workflow:
1 Stack information
2 Configure variables, which is in bold font to indicate it is the current page.
3 Review

There are fields with sample text:
-Database Port
-Database Port 2
-Elasticsearch HTTP Port
-Minimum Jolt port
-Number of psappsrv processes